The Whitewater River Run from Headwaters in Sec 8, T3S, R25 E to Hemlock Crossing in California is a popular destination for white water enthusiasts. The ideal streamflow range for this run is between 500-1500 cfs. This segment of the river is rated as Class III, with Class IV rapids at some points. The segment mileage is approximately 10 miles, and it takes around 4-5 hours to complete.

The rapids on this river run are thrilling and challenging, with specific rapids such as the "S-turn," "The Maze," and "Widowmaker." There are also several naturally occurring obstacles such as rocks, drops, and tight turns that require technical navigation. It is important to note that this run is recommended for experienced white water paddlers only.

There are specific regulations in place for this area to ensure safety and preserve the natural environment. The use of personal flotation devices (PFDs) is mandatory, and all paddlers must have a whistle and a throw rope. Camping and fires are not allowed in the Hemlock Crossing area, and littering is strictly prohibited.

In conclusion, the Whitewater River Run from Headwaters to Hemlock Crossing in California is a thrilling and challenging experience for experienced white water paddlers. The ideal streamflow range, class rating, segment mileage, specific river rapids/obstacles, and regulations of the area must be considered before embarking on this adventure.